DE69221799D1 - HYDRAULIC CONTROL SYSTEM OF AN EARTH CONSTRUCTION MACHINE - Google Patents

HYDRAULIC CONTROL SYSTEM OF AN EARTH CONSTRUCTION MACHINE

Info

Publication number
DE69221799D1
DE69221799D1 DE69221799T DE69221799T DE69221799D1 DE 69221799 D1 DE69221799 D1 DE 69221799D1 DE 69221799 T DE69221799 T DE 69221799T DE 69221799 T DE69221799 T DE 69221799T DE 69221799 D1 DE69221799 D1 DE 69221799D1
Authority
DE
Germany
Prior art keywords
control system
hydraulic control
construction machine
earth construction
earth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69221799T
Other languages
German (de)
Other versions
DE69221799T2 (en
Inventor
Yukio Aoyagi
Tomohiko Yasuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Publication of DE69221799D1 publication Critical patent/DE69221799D1/en
Application granted granted Critical
Publication of DE69221799T2 publication Critical patent/DE69221799T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
DE69221799T 1991-04-15 1992-04-15 HYDRAULIC CONTROL SYSTEM OF AN EARTH CONSTRUCTION MACHINE Expired - Fee Related DE69221799T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10810591 1991-04-15
PCT/JP1992/000477 WO1992018711A1 (en) 1991-04-15 1992-04-15 Hydraulic driving system in construction machine

Publications (2)

Publication Number Publication Date
DE69221799D1 true DE69221799D1 (en) 1997-10-02
DE69221799T2 DE69221799T2 (en) 1998-02-12

Family

ID=14476009

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69221799T Expired - Fee Related DE69221799T2 (en) 1991-04-15 1992-04-15 HYDRAULIC CONTROL SYSTEM OF AN EARTH CONSTRUCTION MACHINE

Country Status (4)

Country Link
US (1) US5277027A (en)
EP (1) EP0533953B1 (en)
DE (1) DE69221799T2 (en)
WO (1) WO1992018711A1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4307872C2 (en) * 1993-03-12 2001-05-17 Orenstein & Koppel Ag Load pressure-independent control of the speed of hydraulic control elements
KR100212645B1 (en) * 1994-09-30 1999-08-02 토니헬샴 Discharge flow controlling unit in hydraulic pump
JP3550260B2 (en) * 1996-09-30 2004-08-04 コベルコ建機株式会社 Actuator operating characteristic control device
JP3425844B2 (en) * 1996-09-30 2003-07-14 コベルコ建機株式会社 Hydraulic excavator
US5873244A (en) * 1997-11-21 1999-02-23 Caterpillar Inc. Positive flow control system
US6594993B1 (en) * 1999-12-23 2003-07-22 Danfoss A/S Hydraulic driving device and system for a vehicle
DE10209964A1 (en) * 2002-03-06 2003-09-25 Zf Lenksysteme Gmbh System for controlling a hydraulic variable pump
US6837319B2 (en) 2002-07-29 2005-01-04 Caterpillar S.A.R.L. Control system for, and a method of, disengaging a hydraulically-driven implement from a work machine
US7331175B2 (en) * 2005-08-31 2008-02-19 Caterpillar Inc. Hydraulic system having area controlled bypass
KR100641397B1 (en) * 2005-09-15 2006-11-01 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Hydraulic control system
US7320216B2 (en) * 2005-10-31 2008-01-22 Caterpillar Inc. Hydraulic system having pressure compensated bypass
US7222484B1 (en) * 2006-03-03 2007-05-29 Husco International, Inc. Hydraulic system with multiple pressure relief levels
US7614335B2 (en) * 2006-11-30 2009-11-10 Caterpillar Inc. Hydraulic system with variable standby pressure
KR100939802B1 (en) * 2007-09-17 2010-02-02 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Hydraulic circuit for heavy equipment
JP5172477B2 (en) * 2008-05-30 2013-03-27 カヤバ工業株式会社 Control device for hybrid construction machine
US20100158706A1 (en) * 2008-12-24 2010-06-24 Caterpillar Inc. Pressure change compensation arrangement for pump actuator
US8893818B2 (en) 2010-12-17 2014-11-25 Caterpillar Inc. Hydraulic system having dual tilt blade control
US8899034B2 (en) * 2011-12-22 2014-12-02 Husco International, Inc. Hydraulic system with fluid flow summation control of a variable displacement pump and priority allocation of fluid flow
JP5809602B2 (en) * 2012-05-31 2015-11-11 日立建機株式会社 Multiple valve device
JP5758348B2 (en) 2012-06-15 2015-08-05 住友建機株式会社 Hydraulic circuit for construction machinery
JP5978056B2 (en) 2012-08-07 2016-08-24 住友建機株式会社 Hydraulic circuit of construction machine and its control device
CA2917987C (en) * 2013-07-24 2018-07-17 Volvo Construction Equipment Ab Hydraulic circuit for construction machine
JP6491523B2 (en) 2015-04-15 2019-03-27 Ｋｙｂ株式会社 Fluid pressure control device
WO2017006417A1 (en) * 2015-07-06 2017-01-12 株式会社 島津製作所 Fluid control device
JP6496213B2 (en) * 2015-08-19 2019-04-03 株式会社 神崎高級工機製作所 Hydraulic actuator hydraulic fluid path forming method and hydraulic actuator hydraulic fluid path structure
CN108026713B (en) * 2015-09-16 2021-03-09 卡特彼勒Sarl Hydraulic pump control system for hydraulic working machine
CN105673603B (en) * 2016-03-09 2017-08-11 合肥工业大学 A kind of hydraulic pressure unit energy-saving driving system and its control method for coordinating
WO2018061165A1 (en) * 2016-09-29 2018-04-05 日立建機株式会社 Hydraulic drive device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1952034A1 (en) * 1969-10-15 1971-04-22 Linde Ag Control device for a hydraulic system and valve for this
US4024710A (en) * 1976-03-25 1977-05-24 Koehring Company Load sensing hydraulic circuit having power matching means
CA1104033A (en) * 1977-02-24 1981-06-30 Commercial Shearing, Inc. Pressure and flow compensated control system with constant torque and viscosity sensing over-ride
US4165613A (en) * 1978-03-27 1979-08-28 Koehring Company Control apparatus for a plurality of simultaneously actuatable fluid motors
US4334408A (en) * 1979-09-19 1982-06-15 Joy Manufacturing Company Pneumatic and hydraulic power control of drill
JPS60199128A (en) * 1984-03-21 1985-10-08 Kayaba Ind Co Ltd Hydraulic control circuit for construction vehicle
JPS6124802A (en) * 1984-07-13 1986-02-03 Hitachi Constr Mach Co Ltd Control circuit for hydraulic pressure device
JP2631125B2 (en) * 1988-04-27 1997-07-16 東芝機械株式会社 Load pressure compensation pump discharge flow control circuit
US5083428A (en) * 1988-06-17 1992-01-28 Kabushiki Kaisha Kobe Seiko Sho Fluid control system for power shovel
US5081838A (en) * 1989-03-28 1992-01-21 Kabushiki Kaisha Kobe Seiko Sho Hydraulic circuit with variable relief valves
JPH0374607A (en) * 1989-08-16 1991-03-29 Komatsu Ltd Hydraulic circuit

Also Published As

Publication number Publication date
EP0533953A1 (en) 1993-03-31
EP0533953B1 (en) 1997-08-27
EP0533953A4 (en) 1994-01-19
WO1992018711A1 (en) 1992-10-29
US5277027A (en) 1994-01-11
DE69221799T2 (en) 1998-02-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee